Finding the Fourth Proportional to 12,008.18, 18,015.24 and 4,986.09

Step by Step Solution

1. Step 1: Write the proportion equation
   12,008.18 : 18,015.24 = 4,986.09 : x
2. Step 2: Convert to fraction form
   12,008.18/18,015.24 = 4,986.09/x
3. Step 3: Cross multiply
   12,008.18x = 18,015.24 × 4,986.09
4. Step 4: Simplify right side
   12,008.18x = 89,825,626.71
5. Step 5: Solve for x
   x = 89,825,626.71/12,008.18
6. Step 6: Final answer
   x = 7,480.37